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Radiation detection is important in many fields, and it poses significant challenges for instrument designers. Radiation detection instruments, particularly for nuclear decommissioning and security applications, are required to operate in unknown environments and should detect and characterise radiation fields in real time. This book covers both theory and practice, and it solicits recent advances in radiation detection, with a particular focus on radiation detection instrument design, real-time data processing, radiation simulation and experimental work, robot design, control systems, task planning and radiation shielding.

passive radiation detection --- gamma-ray --- neutron --- illicit trafficking --- national security --- non-proliferation --- ground-penetrating radar --- gamma ray detector --- sensor fusion --- nuclear wastes --- nuclear decommissioning --- radiation detection --- radiological characterisation --- rheology --- rapid prototyping --- radiation sensing technologies --- partial discharges --- scintillations --- air insulation --- photomultiplier --- COTS commercial MAPS --- radiation response --- integral time --- gain --- high-energy α-particle detection --- low voltage --- thick depletion width detectors --- remote-depth profiling --- gamma spectral analysis --- Bayesian inference --- uncertainty estimation --- radioactive nuclear waste --- radiological characterization --- low-resolution detector --- remote depth profiling --- radioisotope identification --- low-level radioactive contaminants --- spectrum-to-dose conversion operator --- G(E) function --- gaussian process regression --- dose rate uncertainty --- real-time dosimetry --- operational quantities --- plastic gamma spectra --- energy broadening correction --- Compton edge reconstruction --- deep learning --- deep autoencoder

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Emerging wide bandgap (WBG) semiconductors hold the potential to advance the global industry in the same way that, more than 50 years ago, the invention of the silicon (Si) chip enabled the modern computer era. SiC- and GaN-based devices are starting to become more commercially available. Smaller, faster, and more efficient than their counterpart Si-based components, these WBG devices also offer greater expected reliability in tougher operating conditions. Furthermore, in this frame, a new class of microelectronic-grade semiconducting materials that have an even larger bandgap than the previously established wide bandgap semiconductors, such as GaN and SiC, have been created, and are thus referred to as “ultra-wide bandgap” materials. These materials, which include AlGaN, AlN, diamond, Ga2O3, and BN, offer theoretically superior properties, including a higher critical breakdown field, higher temperature operation, and potentially higher radiation tolerance. These attributes, in turn, make it possible to use revolutionary new devices for extreme environments, such as high-efficiency power transistors, because of the improved Baliga figure of merit, ultra-high voltage pulsed power switches, high-efficiency UV-LEDs, and electronics. This Special Issue aims to collect high quality research papers, short communications, and review articles that focus on wide bandgap device design, fabrication, and advanced characterization. The Special Issue will also publish selected papers from the 43rd Workshop on Compound Semiconductor Devices and Integrated Circuits, held in France (WOCSDICE 2019), which brings together scientists and engineers working in the area of III–V, and other compound semiconductor devices and integrated circuits.

GaN --- high-electron-mobility transistor (HEMT) --- ultra-wide band gap --- GaN-based vertical-cavity surface-emitting laser (VCSEL) --- composition-graded AlxGa1−xN electron blocking layer (EBL) --- electron leakage --- GaN laser diode --- distributed feedback (DFB) --- surface gratings --- sidewall gratings --- AlGaN/GaN --- proton irradiation --- time-dependent dielectric breakdown (TDDB) --- reliability --- normally off --- power cycle test --- SiC micro-heater chip --- direct bonded copper (DBC) substrate --- Ag sinter paste --- wide band-gap (WBG) --- thermal resistance --- amorphous InGaZnO --- thin-film transistor --- nitrogen-doping --- buried-channel --- stability --- 4H-SiC --- turn-off loss --- ON-state voltage --- breakdown voltage (BV) --- IGBT --- wide-bandgap semiconductor --- high electron mobility transistors --- vertical gate structure --- normally-off operation --- gallium nitride --- asymmetric multiple quantum wells --- barrier thickness --- InGaN laser diodes --- optical absorption loss --- electron leakage current --- wide band gap semiconductors --- numerical simulation --- terahertz Gunn diode --- grooved-anode diode --- Gallium nitride (GaN) high-electron-mobility transistors (HEMTs) --- vertical breakdown voltage --- buffer trapping effect --- gallium nitride (GaN) --- power switching device --- active power filter (APF) --- power quality (PQ) --- metal-insulator-semiconductor high-electron-mobility transistor (MIS-HEMT) --- recessed gate --- double barrier --- high-electron-mobility transistors --- copper metallization --- millimeter wave --- wide bandgap semiconductors --- flexible devices --- silver nanoring --- silver nanowire --- polyol method --- cosolvent --- tungsten trioxide film --- spin coating --- optical band gap --- morphology --- electrochromism --- self-align --- hierarchical nanostructures --- ZnO nanorod/NiO nanosheet --- photon extraction efficiency --- photonic emitter --- wideband --- HEMT --- power amplifier --- jammer system --- GaN 5G --- high electron mobility transistors (HEMT) --- new radio --- RF front-end --- AESA radars --- transmittance --- distortions --- optimization --- GaN-on-GaN --- schottky barrier diodes --- high-energy α-particle detection --- low voltage --- thick depletion width detectors --- n/a